.526 
CV1I. GRAMINE7E. 
§§ Glumes conspicuously shorter than the rest of the spihelet. 
|| Panicle spiked, or somewhat contracted and rigid. 
21. Koeleria. Panicle cylindrical. Spikelets without a pectinate 
bractea. Glumellas membranous; outer one 3-nerved, keeled, 
pointed, entire. 
30. Cynosurus. Panicle unilateral. Spikelets with a pectinate bractea 
at the base. Glumes shortly awned. Glumellas membranous, 
linear-lanceolate ; outer one mucronate or awned at the end. 
26. Poa. Panicle unilateral. Spikelets without a pectinate bractea. 
Glumes awnless; outer glumella scarious on the margin, pro- 
minently 5 — 7-nerved, obtuse or mucronate. 
1111 Panicle or raceme more or less lax, spreading or contracted. 
15. Catabrosa. Panicle spreading. Spikelets awnless, scarcely com- 
pressed, ovate, with 3 fertile florets. Glumellas glabrous on the 
keel, and at the base, membranous, very obtuse. Caryopsis free. 
17. Moi.inia. Panicle contracted, but rather lax. Spikelets lanceolate, 
awnless, with 3 perfect semicylindrical florets and a subulate rudi- 
mentary neuter one. Glumellas 3 — 7-nerved, glabrous, entire 
at the end, ultimately cartilaginous and inclosing the caryopsis. 
26. Poa. Panicle lax or contracted. Spikelets ovate or linear, and 
compressed, or cylindrical, awnless. Outer glumella somewhat 
ovate, bluntish, rarely tipped with a minute point, herbaceous, 
with a scarious margin. Caryopsis free. 
28. Briza. Panicle lax. Spikelets awnless, much compressed laterally, 
cordato-deltoid, with 3 perfect florets. Outer glumella navicular, 
obtuse, convex on the back, ultimately coriaceous and inclosing the 
caryopsis. 
29. Dactyi.is. Panicle with the secondary branches short and very 
dense, subsecund. Spikelets with 3 — 4 perfect florets, compressed. 
Outer glumella lanceolate, keeled, and ciliate on the back, with a 
short bristle close to the summit, inclosing the caryopsis. 
31. Festuca. Panicle lax or coarctate. Spikelets many-flowered, more 
or less laterally compressed. Outer glumella lanceolate, convex 
on the back, very acute or awned at the point, the lateral nerves 
slightly converging and disappearing below the summit. Styles 
terminal. 
32. Bromus. Panicle lax, spreading, or coarctate. Spikelets many- 
flowered, more less laterally compressed. Outer glumellas convex 
on the back, 2 of the lateral nerves usually uniting and forming 
an awn below the bifid summit. Styles from below the summit 
of the caryopsis. 
Florets enveloped in long silky hairs attached to the axis. 
34. Phragmites. Panicle lax. Spikelets with 3 — 4 distant perfect 
flowers and a barren 3-androus one at the base. Outer glumella 
tapering with a long narrow subulate point. 
b. Spikelets spiked, either quite sessile or shortly stalked, and arranged in a 
simple or compound spike or spike-like raceme. 
* Spikelets inserted on different sides of the rachis. sometimes slightly unilateral. 
Spikes usually simple. Styles short. Stigmas thick plumose. 
35. Ei/ymus. Spikelets in pairs, each with 2 — 4 perfect florets. Glumes 
collateral, awnless. 
